.content{
  background: #fff;
  height: 100vh;
}
.iconfont{
  color: #9b9b9b;
  font-size: 16px;
}
.btn{
  position: fixed !important;
  bottom: 20px;
  width: 90%;
  left: 50%;
  transform: translate3d(-50%,0,0);
  margin: 0 auto;
  background: #eee;
}